I have the same issue with the same version of Lr, there is no error message, I am currently trying to import 4 RAW images, it's been 45minutes and it just reads importing files, and there is no progress.

Make sure there is no video files in the same folder. If there are any cell phones or tablets attached to your computer, disconnect them. Also, make sure that the Destination panel on the right hand side of the Import dialog box is present and expanded.

This means you don't have WRITE permission to the folder where you are trying to copy the photos into. So, determine what folder you are trying to copy the photos into (it's in the Import dialog box on the right under Destination), then go into your operating system and change the permissions on that EXACT folder to WRITE permission.